skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Performance-defining properties of Nb3Sn coating in SRF cavities

Journal Article · · Superconductor Science and Technology
 [1]; ORCiD logo [1];  [1];  [2]; ORCiD logo [2];  [3];  [3]
  1. Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
  2. Univ. of Illinois, Urbana, IL (United States). Materials Science and Engineering Dept.
  3. Cornell Univ., Ithaca, NY (United States). Cornell Lab. for Accelerator-Based Sciences and Education
+ Show Author Affiliations

Nb3Sn has potential to become the material of choice for fabrication of SRF cavities. The higher critical temperature of Nb3Sn potentially allows for an increased operational temperature in SRF cavities, which could enable a simplification of the cryogenic system, leading to significant cost reduction. We present extended characterization of a Nb3Sn coated Nb cavity prepared at Cornell University. Using a combination of thermometry during cavity RF measurements, and structural and analytical characterization of the cavity cutouts, we discovered Nb3Sn coating flaws in regions that exhibit significant heating during the RF testing. Results of extended comparison of cavity cutouts with different dissipation profiles not only indicate the cause of significant Q degradation but also establish figures of merit for material qualities in relation to the quality of SRF performance.

Research Organization:
Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States); Cornell Univ., Ithaca, NY (United States); Univ. of Illinois at Urbana-Champaign, IL (United States)
Sponsoring Organization:
USDOE Office of Science (SC), High Energy Physics (HEP); National Science Foundation (NSF)
Grant/Contract Number:
AC02-07CH11359; SC0008431; ECCS-1542205; DMR-1121262; PHY-1549132; DMR-1120296
OSTI ID:
1467110
Report Number(s):
FERMILAB-PUB-17-422-TD; arXiv:1707.05856; 1610667
Journal Information:
Superconductor Science and Technology, Vol. 31, Issue 1; ISSN 0953-2048
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 10 works
Citation information provided by
Web of Science

References (14)

RF Superconductivity book March 2009
Superconducting Radio-Frequency Cavities journal October 2014
Proof-of-principle demonstration of Nb 3 Sn superconducting radiofrequency cavities for high Q 0 applications journal February 2015
Advances in development of Nb 3 Sn superconducting radio-frequency cavities journal November 2014
Nb 3 Sn superconducting radiofrequency cavities: fabrication, results, properties, and prospects journal January 2017
A review of the properties of Nb 3 Sn and their variation with A15 composition, morphology and strain state journal June 2006
The physical and structural properties of superconducting A15-type Nb-Sn alloys journal August 1981
Specific heat of thin-film A 15 superconductors: An anomalous inhomogeneity discovered journal July 1987
Analysis of Nb 3 Sn surface layers for superconducting radio frequency cavity applications journal February 2015
Grain boundary diffusion and growth of intermetallic layers: Nb 3 Sn journal September 1974
Defects and diffusion mechanisms in Nb3Sn journal January 1984
Transmission electron microscopy study of the off-stoichiometric Cu3Au superlattices journal May 1963
Microdiffraction from antiphase domain boundaries in Cu 3 Au journal September 1982
A Review of the Properties of Nb3Sn and Their Variation with A15 Composition, Morphology and Strain State text January 2006

Cited By (1)

Development of sputtered Nb 3 Sn films on copper substrates for superconducting radiofrequency applications journal January 2019

Similar Records

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
Nb3Sn
SRF materials
films
microscopy